This species is also gathered for biomedical companies because its copper-containing blood is used to create a pharmaceutical product, Limulus amoebocyte lysate (LAL) that is used to detect pathogenic endotoxins on medical devices and in injectable drugs (Novitsky, 1984; Mikkelsen, 1988; Levin et al.

Purity was assessed by endotoxin content (determined by chromogenic endotoxin assay, using a modified limulus amoebocyte lysate and a synthetic color-producing substrate), which was considered acceptable in concentrations <0.

In a successful second career as head of Associates of Cape Cod, Watson and company produced that extract--limulus amoebocyte lysate (LAL)--which is used by hospitals and medical device producers worldwide to detect bacterial contamination and ensure safe products.

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